Windows

Janos Technology is offering Plano Windows in a variety of crystalline materials, diameters, as well as uncoated & coated optics. Our clearance section is priced at lower prices from our standard catalog offering. These product are available to ship within 24 hours of your order being placed. Please note: These products are available while supplies last so check this section frequently.

In this section you will also find Brewster Angle Windows. A window positioned at Brewster's Angle with respect to incoming radiation does not reflect radiation polarized parallel to the plane of incidence (p-polarized) but it will reflect some of the s-polarized radiation. The reflected radiation is entirely s-polarized (polarized perpendicular to the plane of incidence).

Brewster angle windows are used in laser cavities to produce polarized output. The output is polarized in the plane formed by the cavity axis and the direction normal to the window. The window is used uncoated which increases its life in contact with a laser medium discharge.

Also used as polarizers either in reflection or transmission. In reflection, some of the useful energy is lost but the output is 100% polarized by one surface. In transmission, 100% of the energy in the desired polarization is retained (neglecting absorption in the material) but a series of window surfaces are needed to produce a highly polarized output.